Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Now, if we turn our attention to the various styles of oratory, we shall find almost as great variety of talents as there are of personal appearance. There were certain kinds of oratory which, owing to the circumstances of the age, suffered from lack of polish, although in other respects they displayed remarkable genius. In this class we may place orators such as Laelius, Africanus, Cato, and even the Gracchi, whom we may call the
Polygnotiand
Callonesof oratory.